bulgaricus microorganism icon color outline

color flat bulgaricus microorganism icon outline vector thin line isolated black medical logo food bacteria bacillus bacterium lactobacillus biological digestion germ microbe probiotic fermentation biology bifidobacterium health positive medicine bacterial lactic prebiotic bifidobacteria science micro organism microscopic bacteriology lactococcus streptococcus flora biotechnology yogurt cell antibiotic infection human propionibacterium healthcare biome microflora colony